Katsuyuki Hirai

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for measuring internal defects for position an...
- Patent number 5,196,716
- Issue date Mar 23, 1993
- Mitsui Mining & Smelting Co., Ltd.
- Kazuo Moriya
- G01 - MEASURING TESTING
Information Patent Grant
Method for quantitative evaluation method of optical absorption ima...
- Patent number 5,077,475
- Issue date Dec 31, 1991
- Mitsui Mining & Smelting Co., Ltd.
- Kazuo Moriya
- G01 - MEASURING TESTING